test_push_notifications: Fix tests failing due to rebase.
test_push_notifications: Fix tests failing due to rebase.

message.triggers got recently renamed.

dhcrzf/zulip,rht/zulip,andersk/zulip,tommyip/zulip,shubhamdhama/zulip,synicalsyntax/zulip,tommyip/zulip,brainwane/zulip,timabbott/zulip,dhcrzf/zulip,mahim97/zulip,showell/zulip,brockwhittaker/zulip,rht/zulip,showell/zulip,punchagan/zulip,eeshangarg/zulip,dhcrzf/zulip,tommyip/zulip,shubhamdhama/zulip,tommyip/zulip,brockwhittaker/zulip,hackerkid/zulip,kou/zulip,jackrzhang/zulip,brainwane/zulip,timabbott/zulip,zulip/zulip,punchagan/zulip,eeshangarg/zulip,brockwhittaker/zulip,synicalsyntax/zulip,synicalsyntax/zulip,brockwhittaker/zulip,andersk/zulip,shubhamdhama/zulip,zulip/zulip,hackerkid/zulip,timabbott/zulip,shubhamdhama/zulip,mahim97/zulip,Galexrt/zulip,zulip/zulip,andersk/zulip,brainwane/zulip,Galexrt/zulip,jackrzhang/zulip,kou/zulip,jackrzhang/zulip,dhcrzf/zulip,eeshangarg/zulip,jackrzhang/zulip,rishig/zulip,hackerkid/zulip,dhcrzf/zulip,zulip/zulip,punchagan/zulip,showell/zulip,kou/zulip,andersk/zulip,andersk/zulip,synicalsyntax/zulip,Galexrt/zulip,eeshangarg/zulip,rishig/zulip,hackerkid/zulip,brainwane/zulip,zulip/zulip,kou/zulip,hackerkid/zulip,jackrzhang/zulip,punchagan/zulip,timabbott/zulip,zulip/zulip,Galexrt/zulip,rishig/zulip,kou/zulip,timabbott/zulip,timabbott/zulip,mahim97/zulip,tommyip/zulip,punchagan/zulip,tommyip/zulip,brockwhittaker/zulip,showell/zulip,eeshangarg/zulip,rishig/zulip,rishig/zulip,rht/zulip,Galexrt/zulip,showell/zulip,jackrzhang/zulip,timabbott/zulip,mahim97/zulip,rht/zulip,eeshangarg/zulip,hackerkid/zulip,dhcrzf/zulip,zulip/zulip,showell/zulip,punchagan/zulip,jackrzhang/zulip,kou/zulip,synicalsyntax/zulip,mahim97/zulip,punchagan/zulip,hackerkid/zulip,rht/zulip,brainwane/zulip,Galexrt/zulip,rishig/zulip,brainwane/zulip,andersk/zulip,synicalsyntax/zulip,andersk/zulip,brainwane/zulip,mahim97/zulip,shubhamdhama/zulip,showell/zulip,brockwhittaker/zulip,shubhamdhama/zulip,Galexrt/zulip,rht/zulip,tommyip/zulip,rht/zulip,kou/zulip,dhcrzf/zulip,rishig/zulip,shubhamdhama/zulip,synicalsyntax/zulip,eeshangarg/zulip